The mass introduced in the default aachenBomb tutorial is much less than that specified in the constant/sprayCloudProperties. The totalMass of 6mg is never reached and after the injection is complete the mass in the system is just under 2mg.

The fix is to lower the parcelsPerSecond to 2E+06 down from 2E+07.

Steps To Reproduce

Simply run the aachenBomb tutorial and monitor the 'mass introduced'.
At the end you may integrate C7H16 (*rho) over the domain (in Paraview) to confirm.